<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        console.log(1)   
        setTimeout(() => {
          console.log(2)
        }, 100)
        console.log(3)
        new Promise((resolve, reject) => {
          console.log(4)
          resolve(5)
          console.log(6)
        }).then(res => {
          console.log(res) // 5
        })
        setTimeout(() => {
          new Promise((resolve, reject) => {
            console.log(7)
            resolve(8)
          }).then(res => {
            console.log(res) // 8
          })
        }, 100)
    
        console.log(9)
      </script>
</body>
</html>